In recent years, dual-cure chemistry has been exploited to realize interpenetrating networks (IPNs) that provide enhanced thermo-mechanical properties. In this contribution, photoinduced curing of (meth)acrylates is used to build the desired 3D structure, whereas the thermally triggered polymerization reaction of 2H-chromene functionalized building blocks is utilized to create the IPN. This strategy combines the advantages of traditional UV-curable monomers with high-performance thermosets. After the successful synthesis of the bispropargyl ether derivative, i.e., 4,4′-(propane-2,2-diyl)bis((ethynyloxy)benzene), its thermally induced conversion to the corresponding 2H chromene functionalized prepolymer is studied by Fourier-transform infrared spectroscopy and gel permeation chromatography. The network formation as well as the printability of various formulations containing different amounts of the thermo-curable building block is investigated. The obtained IPNs provide enhanced thermo-mechanical properties making these resins suitable for the additive manufacturing of functional 3D parts for high-performance applications.
|Fachzeitschrift||Advanced engineering materials|
|Publikationsstatus||Elektronische Veröffentlichung vor Drucklegung. - 29 Sep. 2022|
Bibliographische NotizFunding Information:
Financial support by the Austrian Research Promotion Agency and the company O.K. + Partner through the project P0231‐F‐06‐13 RASANT is gratefully acknowledged. The authors thank Karin Bartl for the experimental support.
© 2022 The Authors. Advanced Engineering Materials published by Wiley-VCH GmbH.